Acceleration judder

Hi all I have a c3 1.6hdi runs fine when cold and when in free flowing traffic as soon as I get stuck in traffic or slow moving traffic when I try to accelerate it judders and won't past 2000rpm I have no warning lights or fault codes so I'm stumpped as to what the problem is any else had this problem or know of a fix many thanks for reading

Bigvern wrote:Hi all I have a c3 1.6hdi runs fine when cold and when in free flowing traffic as soon as I get stuck in traffic or slow moving traffic when I try to accelerate it judders and won't past 2000rpm I have no warning lights or fault codes so I'm stumpped as to what the problem is any else had this problem or know of a fix many thanks for reading

Hi Bigvern, is the service schedule up to date?

What tool did you use to read codes?

Yes I service it every year and can't remember the name of the device all I know it plugged in to connection in the glove box came up with no codes found was thinking it could be the dpf at first but not sure if car has one to be honest

Bigvern wrote:Yes I service it every year and can't remember the name of the device all I know it plugged in to connection in the glove box came up with no codes found was thinking it could be the dpf at first but not sure if car has one to be honest

'No Codes' on an OBD reader means the reader can't read any codes, not that there are no codes.

There may or may not be codes that the basic OBD reader can't read. The correct reader to cover the complete C3 is the lexia clone tool (from here), there is a topic about the lexia tool (here).

If you had DPF (or FAP) codes then the lexia would bring these up, along with any other code the C3 could throw at you.

OK thanks will have a look and see thanks for info